Salt-making apparatus



T. ORANEY.

SALT MAKING APPARATUS.

(No Model.)

PatentedJune 29, 1886.

N. PETERS, PhntoLilhogripher, Washington. D. C,

is a plan thereof.

UNITED rarns Arena @rrrcia.

THOMAS ORAN ESL OF BAY CITY, MICHIGAN.

SALT MAKING APPARATUS.

SPECIFICATION forming part of Letters Patent No, 344,634, dated June 29,1886.

Application filed October 29, 1885. Serial No. 181,256. (No model.) i

To allwhom it may concern:

Be it known that I, THOMAS CRANEY, of Bay City, in the county of Bay andState of Michigan, have invented new and useful Improvements inSalt-Making Apparatus; and I do hereby declare that the following is afull, clear, and exactdescription thereof, reference being had to theaccompanyingdrawings, which form a part of this specification.

This invention relates to a new and useful improvement in apparatus formanufacturing salt; and the invention consists in the arrangement andconstruction of a novel device for heating and evaporating the brine,allas more fully hereinafter set forth.

In the drawings which accompany this specification, Figure 1 is avertical central longitudinal section of the apparatus. Fig. 2 is across-section on line 00 0c in Fig. 1. Jig. 3

Ais a brine receiving and evaporating pan, substantially of the formheretofore used in the manufacture'of salt,'and commonly called agrainer.

B is a metallic box of corresponding shape with the pan, and of suchrelative dimensions in regard to the pan that it can be secured thereinin the position shown in the drawings-that is, completely submerged inthe brine-and with its bottom and sides at such a distance from thebottom and sides of the pan as willappear hereinafter. lhe box may besecured in this position by suspending it from the top or by supportingit on brackets from the sides of the pan, or in any other convenientmanner that will not interfere with the operation of the device,ashereinafter dc scribed. This box is provided with steam inlets andoutlets O D, and with a series of vertical flues, E, which are open ontop and bottom, leaving the box stcanrtight. These tubes are spacedclosely,with enough distance between them to permit a free circulationof steam around the tubes.

In practice, steam'being admitted to the steambox B, the brine in thepan will get quickly heated, while at the same time a rapid circulationwill take place through the whole brine, said circulation being in 'anupward direction through the fines E and in a downward direction on thesides of the box. It

will be seen that as the salt crystals begin to form the circulationwill carry them quickly to the bottom of the pan, and, provided there isenough room left there to allow the crystals to settle, they willaccumulate there, and can be withdrawn by a suitable scraper-such as theknown endless-scraper device G, shown in the drawings-which passesunderneath the steam-box and draws the salt up the incline H.

It is not necessary to provide for a free circulation of brine upon allsides of the steambox, although I consider it preferable, as the wholeheating-surface of the box is made operative thereby. I also prefer tohave the bottom of the pan unobstructed, so as to leave the scraper freeto scrape the whole bottom.

As iron is liable to discolor the salt, I profor to make the steam-boxand tubes of copper, or copper and iron combined, the copper coveringthe parts exposed to contactwith the brine.

I am enabled to make with an apparatus thus constructed a larger amountof salt than has been possible heretofore with a pan of like capacity,the manufactured salt being also of much finer and even grade, owing tothe uniform heating and circulation of the whole brine and the rapidevaporation due to the large increase of heatingsurface, which I haveobtained by means not heretofore used or known in connection withsalt-pans,and which I have adapted to the purpose so as not to interfcre with the collection of the salt.

In an application concurrent with the present one I have described amodification of the apparatus.

That I claim as my invention is- 1. In combination with the salt pan, asteamheating box of corresponding shape, and provided with a series ofcirculating fines or passages arranged and operating substantially asdescribed.

2. In an apparatus for making salt, the combination of the followingelements: A salt pan or grainer, and a steam-heating box'secured withinthe grainer at a distance above its bottom,with a free circulation ofbrine on one or more sides, and provided with vertical brinecirculatingflues or passages through it, substantially as described.

3. In combination,thcsalt-pan A, the steamheating box B, ofcorresponding shape,seeured within the grainer at a distance above thebottom, and with a free circulation of brine upon its sides, and aseries of vertical brine-circu- 5 lating passages or flues through thesteamheating box, said box being provided with steam inlets and outletsC D, and said vertical flues being inclosed within the box, all arrangedsubstantially as described.

THOS. ORANEYQ Witnesses:

H. S. SPRAGUE, CHARLES J. HUNT.

